Weighing-scale



(No man.) A

N. DU BRUL.

^ WBIGHING'SCALB.

No. 299,761.. Pate'ntedJune 3, 1884.

UNITED STATES PATENT OEEIOE.

NAPOLEON DU EEUL, OE OINOINNATI, OHIO.

WEIGHING-SCALll-.

SPECIFICATION forming part of Letters Patent No. 299,761, dated June 3,1884.

i Application filed January 25, 1884. (No model.)

To all whom it may concerns Be it known that I, NAPOLEON DU BEUL, ofCincinnati, in the county of Hamilton and State of Ohio, have invented anew and useful Improvement in Weighing-Scales, of which the following isa specification.

My invention relates to improvements in those balances orweighing-scales in which the torsional elasticity of metal or analogousma- IO terial is employed to control the oscillations of the beam. y

My improvements have for their object the production, at a moderateexpense, of a torsionbalance of great simplicity, sensitiveness, anddurability.

In another application, No. 118,691, I have shown, described, andclaimed, and applied to one form of scale a at torsion strip, bar, orrod stretched horizontally and set up edgewise 2O to form a fulcrumstrip, bar, or rod for a beam.

its other end carries a sliding weight and lent elastic material.

hanger for additional weights.

In the accompanying drawings, Figure 1 is a partly sectional elevation.Fig. 2 is a plan.

A is the base, Av the standard, and A the T-head, of a cast-metalsupport orstand. The T- head A at one end bifurcates into two lugs, B,to each of which is fastened by clampingblock D and screw E one end ofastretched fiat strip, bar, or rod, C, of steel or equiva,

The lugs B are the ful-- Crum-lugs, and the strip, bar, or rod C thefulcrum strip, bar, or rod. To the fulcrum ,strip, bar, or rod, at itsmid-length, there is attached, by similar clamping-block and screw tothose already described, a scale-beam, F,

which extends on both sides of the fulcrum strip, bar, or rod. On oneside of the fulcrum strip, bar, or rod the beam F takes the form of aloop, G, to whichare properly attached the 0 ends of a torsion stri Jbar or rod H similar 5 1 7 7 a to the fulcrum strip, bar, or rod.Similarly attached to the mid-length of the end torsion strip, bar, orrod is the stem J of a suspended stirrup, J', which carries a pendentpan or platform, K. The stem J extends above the supporting strip, bar,or rod H, and is surmounted by a small supplementary pan, K. The beam onthis side of the fulcrum terminates in a second loop, G, which iscrossed by a screw-threaded rod, R, that carries an 6o adjustableauxiliary weight, S, for trimming or leveling either a loaded orunloaded scale. The beam on the other side ofthe fulcrum is marked witha scale, L, and carries a slidable weight, M. Suspended from theextremity of the same portion of the beam F'is a hanger, N, to receiveadditional weights when necessary. It is apparent that in thisconstruction of scale there are only two pivotal torsion strips, bars,or rods, and the weight of the suspended pan K maintains both it and thesupplementary pan K to proper horizontality without any guides in everyposition of the beam. The weight of the pan K and its hanger in thedescribed combination with the torsion strip, bar, or rod H not onlyproves a very sensitive arrangement, but enables the easy carrying ofthe small supplementary pan K above the pivotal point for lightarticles, and at a trivial expense.

In a useful modification of this form-applicable, for instance, toweighing letters and other light articles-the part of the pan-supportbelow the torsion strip, bar, or rod may take the form of a pendant ofsufficient weight to support and maintain the pan K above the saidstrip, bar, or rod in horizontal position during its oscillations,independently of pan K, which may be omitted.

I claim as new and of my invention 1. In a weighing-scale, thecombination of a beam having its fulcrum-support acting torsionally, atorsion strip, bar, or rod fastened -rigidly to the beam, and a platformsecured directly and rigidly to and suspended from the torsion strip,bar, or rod, as set forth.

2. In a weighing-scale, the combination of a beam having itsfulcrum-support acting torA sionally, a torsion strip, bar, or rodsecured by its ends rigidly to the beam, and a platform secured directlyand rigidly to and suspended from the torsion strip, bar, or rod, andhaving a light supplementary pan above the beam, as set forth. w

In testimony of which invention I hereunto set my hand.

NAPOLEON DU BRUIT.

Attest:

GEO. H. KNIGHT, SAML. S. CARPENTER.

ICO

